Informations sur le montage des cartes MiniCV et Midimplant

[kroutshev2]

Comme indiqué dans le sujet de l'achat groupé, voici les informations que m'a fourni Roman au sujet du montage dans le korg MS20 et le Moog source.

hi,
included is very simple schematic. Better use precision opamp, like
common OP07, easy to find everywhere. You can supply the circuit from
MS20 power supply, but do not forget to add decoupling capacitors on
OP07 supply rails.

Opamp output should be connected to "VCO 1+2 CV IN" jack, below the
volume knob. It must be real plug, to disconnect internal keyboard when
using MIDI.

Let me know if that's OK with you or you need more info.
To connect MIDI2CV together with internal keyboard and be able to play
both at the same time, you need more complex circuit and I wouldn't
recommend it to do on breadboard. I will make such special MIDI2CV for
old Korgs in the future.

You can also set MIDImplant in V/oct mode and plug it to "FREQ" input,
which is tunable V/oct, but it may be difficult to tune the instrumnt
then properly.



The Source is very easy, plug the CV into CV in. Gate needs the same
transistor circuit as MS20, but MINICV can be used directly, if you set
it for reversed gate action via MIDI System Exclusive, as described in
MINICV manual chapter 5.4. I could not find gate part in Source
schematics, so I'm not 100% sure it will work that way, but the mod with
transistor circuit will always work with MIDImplant or MINICV.

Roman

[trz]

kits bien reçu, ils sont vraiment mini (genre carte sim)
merci !!!

[kroutshev2]

Bonjour,
ça y est je me suis lancé, j'attaque le montage du minicv dans le source. J'ai branché l'alimentation +15V, masse, la prise Din (j'utilise celle de l'interface cassette) par contre concernant le cv et le S-trig, comment savoir sur les prises jack ou est le "cv in" et le "gate in" ?
Merci de votre aide.
K.

[kroutshev2]

C'est bon j'ai trouvé l'info chez Kenton :

The Moog Source is already fitted with CV & Trig control sockets, which is all you need for control of the notes, however it could benefit from fitting an additional socket for control of the filter cutoff frequency. The two relevant sockets fitted as standard are as follows:

CV INPUT ( for controlling the pitch of the notes)
Labelled: KB-CV IN/OUT
Socket type: 1/4" stereo jack
Connections: Tip = not connected, Ring = CV input signal, Sleeve = Ground (to screen)
Setting: Volts per Octave (CV) - this is the default setting on our converters

GATE/TRIG INPUT (for controlling when the notes play)
Labelled: TRIG IN/OUT
Socket type: 1/4" stereo jack (but could be Cinch-Jones 2 pin)
Connections (Jack): Tip = not connected, Ring = trig input signal, Sleeve = Ground (to screen)
Connections (C-J): Short pin = trig input signal, Long pin = Ground (to screen)
Setting: S-Trig

These connections are described on page 48 of the Moog Source user manual

[krackDown]

Merci Kroutchev, l'info est précieuse !

[krackDown]

Ce qui serait vraiment bien (si ça ne t'embête pas évidemment), ce serait de faire quelques photos de ton montage et de tes point de connexion à l'intérieur de la machine. Et l'idée d'utiliser la fiche DIN de l'interface cassette est des plus ingénieuse, histoire de ne pas défigurer, transpercer, empaler, trucider ce beau Source !

[kroutshev2]

Pas de probleme, je ferais des photos !